Some aspects of the geographical distribution of parasites.
D000820:Animal Diseases; D000818:Animals; D005399:Fishes; D005843:Geography; D049690:History, Ancient; D049711:History, Modern 1601-; D006725:Hookworm Infections / Q000453:epidemiology*; D006801:Humans; D014201:Trematode Infections / Q000662:veterinary*